A Novel Piggyback Selection Scheme in IEEE 802.11e HCCA

Lee, Hyun-Jin; Kim, Jae Hyun

doi:10.1093/ietcom/e91-b.5.1619

Cited by 2 publications

(3 citation statements)

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“…However, the use of HCCA has some shortcomings: (i) it introduces significant complexity, including, e.g., the scheduling configuration [13], (ii) it uses very small transmission rates for the data piggybacked on the CF-Poll frame, which results in the "CF-Poll piggyback problem" identified in [14], (iii) if the downlink voice frames are sent in the contention-free period (CFP), additional downlink delay is incurred while waiting for this period [15], and (iv) if they are sent in the contention-period (CP), the ACK for the uplink frame cannot be piggybacked, which leads to the use of three frames per exchange. In contrast, VoIPiggy achieves a substantially more efficient operation using a very simple scheme.…”

Section: Related Workmentioning

confidence: 99%

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VoIPiggy: Analysis and Implementation of a Mechanism to Boost Capacity in IEEE 802.11 WLANs Carrying VoIP Traffic

Salvador

Mancuso

Serrano

et al. 2014

IEEE Trans. on Mobile Comput.

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Abstract-Handling voice traffic in existing WLANs is extremely inefficient, due to the large overhead of the protocol operation as well as the time spent in contention. In this paper, we propose a simple scheme (VoIPiggy) to improve the efficiency of WLANs with voice traffic. The key idea of the mechanism is to piggyback voice frames onto the MAC layer acknowledgments, which reduces both the frame overhead and the time wasted in contention. To quantify the gains of our proposal, we first study its performance by means of a capacity and delay analysis of a WLAN operating under the VoIPiggy mechanism. Then, we present an implementation of the mechanism using commercial off-the-shelf devices, which involves programming at the driver and firmware levels. The performance of the proposed scheme is evaluated in a large-scale testbed consisting on 30 devices. Our extensive measurements, which comprise different network conditions in terms of number of active nodes, traffic load and transmission rates, confirm that the experimental results match the analytical ones, and show a dramatic performance improvement for both "voice only" and "voice and data" scenarios.

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Section: Related Workmentioning

confidence: 99%

“…Other former works have proposed the use of piggybacking to improve WLAN performance [17], [18], yet their evaluation is performed exclusively via simulations.…”

Section: Related Workmentioning

confidence: 99%

VoIPiggy: Analysis and Implementation of a Mechanism to Boost Capacity in IEEE 802.11 WLANs Carrying VoIP Traffic

Salvador

Mancuso

Serrano

et al. 2014

IEEE Trans. on Mobile Comput.

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“…Piggyback scheme has been addressed in many researchers before (Lee et al, 2010;2007a;2007b) and the main idea for piggyback is when the receiver station has a frame to the sender station and allows sending the data frame with ACK to the sender, this process is called a piggyback scheme. So the acknowledgment gets a free ride in the data frame and takes few bits and this is a distinct ACK.…”

Section: Overview Of Piggyback Schemementioning

confidence: 99%

Transmission Control Protocol Performance Comparison Using Piggyback Scheme in Wlans

Milad¹

2013

Journal of Computer Science

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The main problem at wireless networks is the overhead at MAC layer; when the data physical rate is increasing it causes increasing the overhead and decreasing at the MAC efficiency. In this study we study the performance comparison of TCP protocol in WLANs with and without using piggyback. The study of results concerning of implemented both mechanisms in NS2 simulator and find out the good performance from this comparison. Based on the results from our experiments show that the Piggyback scheme is one of the efficient ways to reduce the overhead at MAC wireless networks.

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A Novel Piggyback Selection Scheme in IEEE 802.11e HCCA

Cited by 2 publications

References 4 publications

VoIPiggy: Analysis and Implementation of a Mechanism to Boost Capacity in IEEE 802.11 WLANs Carrying VoIP Traffic

VoIPiggy: Analysis and Implementation of a Mechanism to Boost Capacity in IEEE 802.11 WLANs Carrying VoIP Traffic

Transmission Control Protocol Performance Comparison Using Piggyback Scheme in Wlans

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